Baloney!! Kim Philby, defected to the USSR. Go read about the rest of the The Cambridge Five. Most were suspected, but not caught. 'Fifth Man' John Cairncrossas confessed and then moved to Rome.
Ignore the guy, he's just a newbie troll, on a dick-waving mission, to aggravate us.
At this point, I'm not disposed to give that country anything until they replace the thousands of hunting arms that American civilians lent them for "The Home Guard" -- which, at the end of WWII, instead of being returned to us, were thrown in the damn ocean!
(And that of course assumes that they'd also get a handle on their role as "Club Med" for Russian spies -- and, stop treating Islam as if it were the State Religion -- and stop penalizing Christianity as if it were the ugly stepchild.)
Until then, anyone from "over there" who feels like coming over here to piss and moan about us not GIVING them vital state secrets can take a hike.
Its not Baloney. I know about Philby and the cambridge five. The point is they and their activites were uncovered.
All nations have a spy problem. Its not going to affect this project because everything is organised vertically. PHilby knew an awful lot about his specialist area of intelligence operations, but nothing about anything else. This is quite usual. All espionage and counter-espionage agencies are organised like this.